Castonguay
# Castonguay

Castonguay is a surname. Notable people with this surname include:

* Alexandre Castonguay (born 1968), Canadian media artist
* Antoine Castonguay (1881–1959), Canadian politician
* Charles Castonguay (born 1940), Canadian mathematician
* Claude Castonguay (1929–2020), Canadian politician
* Émilie Castonguay, Canadian sports agent
* Éric Castonguay (born 1987), Canadian ice hockey player
* Jeannot Castonguay (born 1944), Canadian politician
* Marilyn Castonguay, Canadian actress
* Mike Castonguay, American musician
* Roch Castonguay, Canadian film and television actor
